Driving device, camera module and electronic equipment

Abstract

The present application provides a driving device, a camera module and an electronic device. The driving device includes: a base; a plurality of drivers, which are arranged in the base, each of which includes a moving part and a driving part, one end of the moving part abuts the driving part, and the other end protrudes out of the base, one end of the driving part is connected to the moving part, and the other end is fixed in the base, and the driving part drives the moving part to move along the optical axis. The driving part in the above-mentioned driving device can be deformed when powered on and drive the moving part to move along the optical axis, thereby driving the movement of the optical lens connected to the moving part, which can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens, with high precision and good imaging quality.

Description

Technical Field

[0001] The present invention relates to the technical field of optical image stabilization, and in particular to a driving device, a camera module and an electronic device. Background Art

[0002] Auto focus (AF) uses the principle of light reflection from the object. The reflected light passes through the lens to form an image and is received on the image sensor. The object distance of the object is then obtained through computer processing, and the lens is automatically moved according to the object distance to complete the focusing.

[0003] Optical image stabilization (OIS) is a method of detecting shake using a gyroscope and then using the OIS motor to translate or rotate the entire lens in the opposite direction to compensate for image blur caused by device shake during exposure.

[0004] For traditional lenses, different motor components are usually used to drive the lens to move or rotate to achieve AF and OIS respectively. In order to meet people's demand for micro zoom lenses, a new type of optical element, namely liquid lens, has emerged that dynamically adjusts the refractive index of the lens or changes its surface shape to change the focal length and achieve optical image stabilization.

[0005] For a liquid lens, AF and OIS of the liquid lens can be achieved simultaneously by driving the same motor assembly. In the process of realizing this application, the inventors found that there are at least the following problems in the prior art: the current driving device of the liquid lens cannot accurately control the displacement deformation of the liquid lens when performing autofocus and optical image stabilization, thereby failing to achieve good autofocus and optical image stabilization effects. Summary of the invention

[0006] In view of this, it is necessary to provide a driving device, a camera module and an electronic device to solve the above problems.

[0007] An embodiment of the present invention provides a driving device, comprising:

[0008] Pedestal;

[0009] A plurality of drivers are arranged in the base, each of the drivers includes a moving part and a driving part, one end of the moving part abuts against the driving part, and the other end protrudes out of the base, one end of the driving part is connected to the moving part, and the other end is fixed in the base, and the driving part drives the moving part to move along the optical axis direction.

[0010] The driving member in the above-mentioned driving device can be deformed when powered on and drive the moving member to move along the optical axis, thereby driving the movement of the optical lens connected to the moving member, which can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens with high precision and good imaging quality.

[0011] In some embodiments, the driver comprises a shape memory alloy.

[0012] In this way, it can be ensured that the driving member is deformed after being energized, thereby driving the moving member to move along the optical axis.

[0013] In some embodiments, the base comprises:

[0014] substrate;

[0015] a cover plate, opposite to the base plate;

[0016] A plurality of side plates are arranged between the base plate and the cover plate, and the driver is arranged in a space surrounded by the base plate, the cover plate and the plurality of side plates.

[0017] The base can accommodate the moving part and fix the driving part.

[0018] In some embodiments, the base has a receiving hole, which passes through the substrate and the cover plate. A limiting groove is provided on one side of the cover plate close to the receiving hole. The limiting groove is adapted to the shape of the moving part, and at least a portion of the moving part is disposed in the limiting groove.

[0019] In this way, the movement of the moving part in a direction perpendicular to the optical axis can be restricted, thereby improving the accuracy of optical image stabilization or autofocus.

[0020] In some embodiments, the moving member is hollow cylindrical, and the driving member includes:

[0021] A first connecting portion connected to the base;

[0022] A second connecting portion is provided between the moving member and the substrate; and

[0023] The deformation part is arranged inside the moving part, and its two ends are respectively connected to the first connection part and the second connection part. When the first connection part is energized, the deformation part deforms and drives the moving part to move along the optical axis. The deformation part is made of shape memory alloy.

[0024] In this way, when the first connecting part is energized, the deformable part can be turned on, so that the deformable part is deformed to drive the moving part to move.

[0025] In some embodiments, a receiving groove is provided on one side of the moving member;

[0026] The first connecting portion has a first end and a second end opposite to each other, the first end is disposed in the receiving groove, and the second end extends out of the receiving groove and is fixed in the base;

[0027] One end of the deformation portion is connected to the first end of the first connection portion.

[0028] In this way, the first connection part can be fixed, and the connection between the deformation part and the second connection part can be achieved.

[0029] In some embodiments, it also includes:

[0030] A circuit board is arranged in the accommodating hole and is arranged around the inner side surfaces of the plurality of side plates, the second end of the first connecting portion is electrically connected to the circuit board; a supporting portion is provided at a position of the circuit board corresponding to the driving member, the second end of the first connecting portion extends between the supporting portion and the cover plate, the second end of the first connecting portion has a first side and a second side opposite to each other, the first side abuts against the cover plate, and the second side abuts against the supporting portion to achieve electrical connection.

[0031] In this way, the circuit board occupies less space, so that the volume of the driving device is smaller, and the support part and the cover plate can fix the first connecting part and also conduct the first connecting part.

[0032] In some embodiments, it also includes:

[0033] A plurality of elastic members are arranged at positions of the substrate corresponding to the second connecting portion of the driver to elastically support the second connecting portion.

[0034] In this way, it can be ensured that the moving parts return to their original positions after power failure.

[0035] In some embodiments, a protruding portion is provided at a position of the substrate corresponding to the elastic member, and each of the elastic members comprises:

[0036] A receiving portion abutting against the protruding portion;

[0037] a restoring portion, which is suspended on one side of the receiving portion close to the axis of the accommodating hole, and the second connecting portion abuts against the restoring portion; and

[0038] The fixing part is respectively connected to the receiving part and the restoring part.

[0039] In this way, the return portion can ensure that the moving element returns to the initial position after power failure.

[0040] In some embodiments, it also includes:

[0041] A position sensor is arranged in the accommodating hole and is used for sensing the moving position of the moving member.

[0042] In this way, the moving position of the moving part can be sensed, thereby improving the accuracy of optical image stabilization.

[0043] An embodiment of the present invention further provides a camera module, comprising:

[0044] A driving device as above; and

[0045] The optical lens is arranged at one side of the driving device and connected to one end of the plurality of drivers, and the optical lens comprises a liquid lens.

[0046] The above-mentioned camera module includes a driving device. The driving part in the driving device can be deformed when powered on and drive the moving part to move along the optical axis, thereby driving the movement of the optical lens connected to the moving part. It can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens with high precision and good imaging quality.

[0047] An embodiment of the present invention further provides an electronic device, including:

[0048] the entity; and

[0049] As the camera module mentioned above, the camera module is arranged on the main body.

[0050] The above-mentioned electronic device includes a driving device. The driving member in the driving device can be deformed when powered on and drive the moving member to move along the optical axis, thereby driving the movement of the optical lens connected to the moving member. It can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens with high precision and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of the three-dimensional structure of the camera module provided in an embodiment of the present application.

[0052] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the camera module shown.

[0053] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the camera module shown.

[0054] Figure 4 A schematic diagram of the three-dimensional structure of an electronic device provided in an embodiment of the present application.

[0055] Main component symbols

[0056] Electronic equipment 300

[0057] Ontology 200

[0058] Camera module 100

[0059] Driving device 10

[0060] Base 12

[0061] Accommodating hole 122

[0062] Substrate 124

[0063] Protrusion 1242

[0064] Cover 126

[0065] Limiting slot 1262

[0066] Side Panel 128

[0067] Drive 14

[0068] Moving parts 142

[0069] Clamping portion 1422

[0070] Receiving groove 1424

[0071] Driving member 144

[0072] First connection portion 1441

[0073] The second connection portion 1442

[0074] Deformation part 1443

[0075] First End 1444

[0076] Second end 1445

[0077] First side 1446

[0078] Second side 1447

[0079] Circuit board 16

[0080] Supporting portion 162

[0081] Elastic member 18

[0082] Receiving Department 182

[0083] Reply Department 184

[0084] Fixed part 186

[0085] Optical lens 20 DETAILED DESCRIPTION

[0086] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0087] It should be noted that when a component is referred to as being "electrically connected" to another component, it may be directly on the other component or there may be a component in the middle. When a component is considered to be "electrically connected" to another component, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

[0088] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0089] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0090] See also Figure 1 An embodiment of the present invention provides a camera module 100, including a driving device 10 and an optical lens 20 connected to each other.

[0091] Please also see Figure 2 and Figure 3 The driving device 10 includes a base 12 and a plurality of drivers 14 .

[0092] The base 12 has a receiving hole 122. A plurality of drivers 14 are disposed in the receiving hole 122, each driver 14 comprising a moving member 142 and a driving member 144, one end of the moving member 142 abuts against the base 12, and the other end protrudes out of the base 12, one end of the driving member 144 is connected to the moving member 142, and the other end is fixed in the base 12, and the driving member 144 drives the moving member 142 to move along the axial direction of the receiving hole 122. The axial direction of the receiving hole 122 coincides with the direction of the optical axis.

[0093] The driving member 144 in the above-mentioned driving device 10 can be deformed when powered on and drive the moving member 142 to move along the axial direction of the accommodating hole 122, thereby driving the movement of the optical lens 20 connected to the moving member 142, which can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens 20 with high accuracy and good imaging quality.

[0094] The base 12 includes a base plate 124 , a cover plate 126 and a plurality of side plates 128 .

[0095] The substrate 124 is substantially rectangular.

[0096] The cover plate 126 has the same shape as the base plate 124 and is disposed opposite to the base plate 124. The receiving hole 122 penetrates the base plate 124 and the cover plate 126. A limiting groove 1262 is disposed on one side of the cover plate 126 close to the receiving hole 122. The limiting groove 1262 matches the shape of the moving member 142, and at least a portion of the moving member 142 is disposed in the limiting groove 1262.

[0097] In this embodiment, part of the outer periphery of the moving member 142 is disposed in the limiting groove 1262. In other embodiments, the entire outer periphery of the moving member 142 is disposed in the limiting groove 1262. In this way, the moving member 142 can be restricted from moving in a direction perpendicular to the axis of the receiving hole 122, thereby improving the accuracy of optical image stabilization.

[0098] The side plates 128 are disposed between the base plate 124 and the cover plate 126 , and the space enclosed by the side plates 128 is in communication with the receiving hole 122 .

[0099] In this embodiment, the plurality of side panels 128 and the cover panel 126 are an integral structure.

[0100] In this embodiment, there are four side panels 128, and the base plate 124, the cover plate 126 and the side panels 128 are arranged to form a rectangular parallelepiped. In other embodiments, the base plate 124, the cover plate 126 and the side panels 128 are arranged to form a cylindrical shape, but are not limited thereto.

[0101] Multiple drivers 14 can be independently controlled, for example, by inputting control instructions to the multiple drivers 14 separately to achieve independent control of the multiple drivers 14; multiple drivers 14 can also be controlled as a whole, for example, by inputting the same instruction to the multiple drivers 14 to control the synchronous movement of the multiple drivers 14; of course, the same instruction can also be input to several drivers 14 among the multiple drivers 14 to control the movement of the several drivers 14, that is, the multiple drivers 14 can be independently controlled to move separately, the multiple drivers 14 can be controlled to move together, or the multiple drivers 14 can be divided into multiple groups, so as to independently control multiple groups of drivers 14.

[0102] In this embodiment, the driving device 10 includes four drivers 14, and the four drivers 14 are respectively located at four sides of the driving device 10. In other embodiments, the driving device 10 may include other numbers of drivers 14, such as five, six or eight, but not limited thereto.

[0103] The moving member 142 is substantially cylindrical and has a clamping portion 1422 at one end of the moving member 142 protruding from the base 12. The clamping portion 1422 is detachably connected to the optical lens 20. In the present embodiment, the clamping portion 1422 is a clamping hook.

[0104] It is understandable that the clamping portion 1422 may also be other structures, as long as the detachable connection between the clamping portion 1422 and the optical lens 20 can be achieved, it is within the protection scope of the present application. Among them, a receiving groove 1424 is provided on one side of the moving member 142, and the receiving groove 1424 passes through the end of the moving member 142 away from the clamping portion 1422.

[0105] The driving member 144 is made of shape memory alloy and includes a first connecting portion 1441 , a second connecting portion 1442 and a deformation portion 1443 .

[0106] The first connection portion 1441 has a first end 1444 and a second end 1445 opposite to each other. The first end 1444 is disposed in the receiving groove 1424 , and the second end 1445 extends out of the receiving groove 1424 and is fixed in the base 12 .

[0107] The second connection portion 1442 is disposed between the moving member 142 and the substrate 124 .

[0108] The deformation part 1443 is disposed in the receiving groove 1424, and its two ends are respectively connected to the first end 1444 of the first connection part 1441 and the second connection part 1442. When the first connection part 1441 is energized, it can conduct the deformation part 1443, so that the deformation part 1443 is deformed and drives the moving member 142 to move along the axial direction of the receiving hole 122. In this embodiment, the deformation part 1443 is a thin cylindrical shape.

[0109] In some embodiments, the driving device 10 further includes a circuit board 16. The circuit board 16 is generally a rectangular ring-shaped circuit board 16 disposed in the receiving hole 122 and arranged around the inner side surfaces of the plurality of side plates 128. The second end 1445 of the first connecting portion 1441 is electrically connected to the circuit board 16. The circuit board 16 occupies a small space, thereby making the volume of the driving device 10 small.

[0110] Among them, a support portion 162 is provided at a position of the circuit board 16 corresponding to the driving member 144, and the support portion 162 is formed by extending from a part on the side of the circuit board 16 toward the axis of the receiving hole 122. The second end 1445 of the first connecting portion 1441 extends between the support portion 162 and the cover plate 126. The second end 1445 of the first connecting portion 1441 has an opposite first side 1446 and second side 1447. The first side 1446 abuts against the cover plate 126, and the second side 1447 abuts against the support portion 162 to achieve electrical connection. In this way, the support portion 162 and the cover plate 126 can fix the first connecting portion 1441 and also conduct the first connecting portion 1441.

[0111] In some embodiments, the driving device 10 further includes a plurality of elastic members 18, and each elastic member 18 is disposed at a position of the substrate 124 corresponding to the second connecting portion 1442 of the driver 14 to elastically support the second connecting portion 1442.

[0112] Specifically, a protruding portion 1242 is provided at a position of the substrate 124 corresponding to the elastic member 18, and the protruding portion 1242 is generally in the shape of a Chinese character 'tu'. Each elastic member 18 includes a receiving portion 182, a restoring portion 184, and a fixing portion 186.

[0113] The receiving portion 182 abuts against the protruding portion 1242 and is adapted to the shape of the protruding portion 1242.

[0114] The restoring portion 184 is generally rectangular. The restoring portion 184 is suspended on a side of the receiving portion 182 close to the axis of the receiving hole 122, and the second connecting portion 1442 abuts against the restoring portion 184.

[0115] The fixing portion 186 connects the receiving portion 182 and the restoring portion 184 respectively. In this way, the restoring portion 184 can ensure that the moving member 142 returns to the initial position after power-off.

[0116] In some embodiments, the driving device 10 further includes a plurality of position sensors (not shown in the figure). The plurality of position sensors are disposed in the receiving hole 122 and are arranged in one-to-one correspondence with the plurality of moving members 142 for sensing the moving positions of the moving members 142. In this way, the moving positions of the moving members 142 can be sensed, and the accuracy of optical image stabilization can be improved.

[0117] The optical lens 20 is disposed on one side of the driving device 10 and is connected to one end of the plurality of drivers 14. The optical lens 20 includes a liquid lens and / or an electrochromic lens.

[0118] The liquid lens changes the wettability of the conductive liquid and its contact surface by applying an electric current to the conductive liquid inside it, causing the contact angle of the liquid surface to change, thereby changing the optical path and achieving zooming.

[0119] The electrochromic lens is made of electrochromic material. When the electrochromic lens is energized, the color of the electrochromic lens will change, thereby changing the size of the aperture, and then changing the amount of light entering. It can meet the photography needs in different environments and also expand the application range of the lens.

[0120] The optical lens 20 in this embodiment includes a liquid lens. It can be understood that the optical lens 20 also includes a common lens, wherein the common lens is a common optical lens different from a liquid lens and an electrochromic lens.

[0121] When the camera module 100 is not working, the elastic member 18 elastically supports the moving member 142 of the driver 14 and the optical lens 20;

[0122] When the camera module 100 is working, the first connection part 1441 can conduct the deformation part 1443 after being energized, so that the deformation part 1443 is deformed, driving the moving part 142 to move along the axis of the accommodating hole 122 toward the direction close to the object. Accordingly, the liquid lens can also be energized as needed to energize the conductive liquid inside it, change the wettability of the conductive liquid and its contact surface, and change the contact angle of the liquid surface, thereby changing the optical path and achieving zooming;

[0123] When the camera module 100 finishes working, the first connection portion 1441 is powered off, and the restoring portion of the elastic member 18 can drive the moving member 142 to return to the initial position.

[0124] The above-mentioned camera module 100 includes a driving device 10. The driving member 144 in the driving device 10 can be deformed when powered on and drive the moving member 142 to move along the axial direction of the accommodating hole 122, thereby driving the movement of the optical lens 20 connected to the moving member 142, and can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens 20, with high precision and good imaging quality.

[0125] See also Figure 4 An embodiment of the present invention further provides an electronic device 300 , including a main body 200 and a camera module 100 , wherein the camera module 100 is disposed on the main body 200 .

[0126] The electronic device 300 includes, but is not limited to, electronic devices supporting imaging, such as smart phones, tablet computers, laptop computers, e-book readers, portable multimedia players (PMPs), portable phones, video phones, digital still cameras, mobile medical devices, and wearable devices.

[0127] The above-mentioned electronic device 300 includes a driving device 10. The driving member 144 in the driving device 10 can be deformed when powered on and drive the moving member 142 to move along the axial direction of the accommodating hole 122, thereby driving the movement of the optical lens 20 connected to the moving member 142, and can realize the functions of optical image stabilization and autofocus, and can accurately control the displacement of the optical lens 20, with high precision and good imaging quality.

[0128] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention. Those skilled in the art may also make other changes within the spirit of the present invention and apply them to the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should be included in the scope of protection claimed by the present invention.

Claims

1. A driving device, characterized in that: include: A base, comprising a base plate, a cover plate and a plurality of side plates, wherein the cover plate is arranged opposite to the base plate, and the plurality of side plates are arranged between the base plate and the cover plate, the base has a receiving hole, the receiving hole passes through the base plate and the cover plate, and a limiting groove is provided on one side of the cover plate close to the receiving hole; A plurality of drivers are arranged in the base, and the plurality of drivers are independently controlled. The drivers are arranged in a space enclosed by the base plate, the cover plate and the plurality of side plates. Each of the drivers comprises a moving member and a driving member. The moving member is hollow cylindrical, and the limiting groove is adapted to the shape of the moving member. At least a portion of the moving member is arranged in the limiting groove. A receiving groove is arranged on one side of the moving member. One end of the moving member abuts against the driving member, and the other end protrudes out of the base. One end of the driving member is connected to the moving member, and the other end is fixed in the base. The driving member drives the moving member to move along the optical axis direction. The driving member comprises: A first connecting portion, connected to the base and having one end thereof extending into the moving member, the first connecting portion having a first end and a second end opposite to each other, the first end being disposed in the receiving groove, and the second end extending out of the receiving groove and fixed in the base; A second connecting portion is provided between the moving member and the substrate; and The deformation part is arranged inside the movable part, and its two ends are respectively connected to the first connection part and the second connection part, one end of the deformation part is connected to the first end of the first connection part, and when the first connection part is energized, the deformation part deforms and drives the movable part to move along the optical axis direction, and the deformation part is made of shape memory alloy.

2. A driving device, characterized in that: include: A base, comprising a base plate, a cover plate and a plurality of side plates, wherein the cover plate is arranged opposite to the base plate, and the plurality of side plates are arranged between the base plate and the cover plate, the base has a receiving hole, the receiving hole passes through the base plate and the cover plate, and a limiting groove is provided on one side of the cover plate close to the receiving hole; A plurality of drivers are arranged in the base, and the plurality of drivers are controlled as a whole. The drivers are arranged in a space enclosed by the base plate, the cover plate and the plurality of side plates. Each of the drivers comprises a moving member and a driving member. The moving member is hollow cylindrical. The limiting groove is adapted to the shape of the moving member. At least a part of the moving member is arranged in the limiting groove. A receiving groove is arranged on one side of the moving member. One end of the moving member abuts against the driving member, and the other end protrudes out of the base. One end of the driving member is connected to the moving member, and the other end is fixed in the base. The driving member drives the moving member to move along the optical axis direction. The driving member comprises: A first connecting portion, connected to the base and having one end thereof extending into the moving member, the first connecting portion having a first end and a second end opposite to each other, the first end being disposed in the receiving groove, and the second end extending out of the receiving groove and fixed in the base; A second connecting portion is provided between the moving member and the substrate; and The deformation part is arranged inside the movable part, and its two ends are respectively connected to the first connection part and the second connection part, one end of the deformation part is connected to the first end of the first connection part, and when the first connection part is energized, the deformation part deforms and drives the movable part to move along the optical axis direction, and the deformation part is made of shape memory alloy.

3. The driving device according to claim 1 or 2, characterized in that: Also includes: A circuit board is arranged in the accommodating hole and is arranged around the inner side surfaces of the plurality of side plates, the second end of the first connecting portion is electrically connected to the circuit board; a supporting portion is provided at a position of the circuit board corresponding to the driving member, the second end of the first connecting portion extends between the supporting portion and the cover plate, the second end of the first connecting portion has a first side and a second side opposite to each other, the first side abuts against the cover plate, and the second side abuts against the supporting portion to achieve electrical connection.

4. The driving device according to claim 1 or 2, characterized in that: Also includes: A plurality of elastic members are arranged at positions of the substrate corresponding to the second connecting portion of the driver to elastically support the second connecting portion.

5. The driving device according to claim 4, characterized in that: The substrate is provided with a protruding portion at a position corresponding to the elastic member, and each of the elastic members comprises: A receiving portion abutting against the protruding portion; a restoring portion, which is suspended on one side of the receiving portion close to the axis of the accommodating hole, and the second connecting portion abuts against the restoring portion; and The fixing part is respectively connected to the receiving part and the restoring part.

6. The driving device according to claim 1 or 2, characterized in that: Also includes: A position sensor is arranged in the accommodating hole and is used for sensing the moving position of the moving member.

7. A camera module, characterized in that: include: A driving device as claimed in any one of claims 1 to 6; and The optical lens is arranged at one side of the driving device and connected to one end of the plurality of drivers, and the optical lens comprises a liquid lens.

8. An electronic device, characterized in that: include: ontology; and The camera module as described in claim 7 is arranged on the main body.

Images